Hi, any way how to revert a course to old version ? I opened an old course to update some slides for a customer, now nothhing works anymore and I am stuck.
I do not know how to get around the errors and cannot open with old version again ..

I assume that you don't keep a reference copy (backup) of the things you've made, then work and debug a different version??

Rolling back might not be very easy if you've changed the actual base files. What failures do you get now it's been updated?

Try the update objects once or twice and see if that makes any difference otherwise you might have to rely on the software team to help you out with this one.